– Lat/Long: 48.71° N 121.99° W
South Twin Sister Weather Forecast
Cascade Range · United StatesIssued: 10 am Thu 10 Sep Local Time
Updates in:
Update imminent hr min s
Issued: 10 am Thu 10 Sep Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–3 Weather SummarySome drizzle, heaviest during Sat night. Very mild (max 19°C on Thu afternoon, min 10°C on Thu night). Wind will be generally light. | Days 4–6 Weather SummaryMostly dry. Warm (max 21°C on Tue afternoon, min 10°C on Sun morning). Wind will be generally light. | |||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | |||||||||||||
AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | |  |  |  |  | | |  | |  | | | |  | | | | |
clear | clear | some clouds | some clouds | light rain | light rain | some clouds | light rain | rain shwrs | some clouds | rain shwrs | some clouds | some clouds | some clouds | clear | clear | clear | clear | |
Cloud base (m) | 1750 | 900 | 1550 | 3100 | 3150 | 2250 | 2950 | 650 | 800 | 1700 | 850 | 1600 | 6800 | 9250 | ||||
km/h | ||||||||||||||||||
 |  |  |  |  |  | |||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | — | 0.2 | 0.1 | — | 0.1 | 0.6 | — | 0.2 | — | — | — | — | — | — | — |
max °C | 17 | 19 | 14 | 13 | 16 | 14 | 18 | 19 | 14 | 13 | 14 | 11 | 13 | 16 | 13 | 19 | 21 | 17 |
min °C | 15 | 18 | 10 | 10 | 14 | 13 | 15 | 18 | 11 | 10 | 13 | 10 | 11 | 15 | 13 | 14 | 21 | 16 |
chill °C | 15 | 18 | 10 | 10 | 14 | 13 | 15 | 18 | 11 | 10 | 13 | 10 | 11 | 15 | 13 | 14 | 21 | 16 |
Freezing level m | 3300 | 3050 | 2600 | 2450 | 2750 | 2750 | 2750 | 2750 | 2800 | 2550 | 2550 | 3100 | 3250 | 3300 | 3200 | 3250 | 3550 | 4000 |
 | 6:37 | — | — | 6:37 | — | — | 6:39 | — | — | 6:41 | — | — | 6:41 | — | — | 6:43 | — | — |
 | — | 7:30 | — | — | 7:29 | — | — | 7:27 | — | — | 7:24 | — | — | 7:22 | — | — | 7:21 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Some drizzle, heaviest during Sat night. Very mild (max 19°C on Thu afternoon, min 10°C on Thu night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Mostly dry. Warm (max 21°C on Tue afternoon, min 10°C on Sun morning). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.